Pore Scale Observations of Trapped CO2 in Mixed-Wet Carbonate Rock: Applications to Storage in Oil Field
We investigated the physical basis of this weakened trapping using pore scale observations of supercritical CO2 in mixed-wet carbonates. The wetting alteration induced by oil provided CO2-wet surfaces that served as conduits to flow. In situ measurements of contact angles showed that CO2 varied from nonwetting to wetting throughout the pore space, with contact angles ranging 25° <θ< 127°; in contrast, an inert gas, N2, was nonwetting with a smaller range of contact angle 24° <θ< 68 °. Observations of trapped ganglia morphology showed that this wettability allowed CO2 to create large, connected, ganglia by inhabiting small pores in mixed-wet rocks. The connected ganglia persisted after three pore volumes of brine injection, facilitating the desaturation that leads to decreased trapping relative to water-wet systems. This data is associated with this open access publication: Environ. Sci. Technol. 2016, 50, 18, 10282-10290. https://doi.org/10.1021/acs.est.6b03111.
nonGeographicDataset
http://www.bgs.ac.uk/ukccs/accessions/index.html#item130205
function: download
https://www.bgs.ac.uk/services/ngdc/accessions/index.html#item130205
function: download
http://data.bgs.ac.uk/id/dataHolding/13607531
eng
This data is associated with this open access publication: Environ. Sci. Technol. 2016, 50, 18, 10282-10290. https://doi.org/10.1021/acs.est.6b03111
geoscientificInformation
publication
2008-06-01
Carbon dioxide
Carbonate rocks
Traps (petroleum)
Nitrogen
Carbon capture and storage
Limestone
revision
2011
NERC_DDC
2016-10-01
2016-10-31
publication
2019-10-04
notApplicable
All core-flooding experiments were performed at 10 MPa pore pressure. Observations were made with either CO2 and water or N2 and water as the two fluid phases. The CO2 experiments were performed at a temperature of 50 °C, while N2 experiments were performed at 25 °C. Observations were made of the ganglion distribution of N2brine or CO2-brine systems after an initial supercritical (sc)CO2 or N2 flooding stage, partially saturating the core with the nonaqueous phase, and again after waterflooding, where the remaining gas ganglia were imaged.
publication
2011
false
See the referenced specification
publication
2010-12-08
false
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
.am
The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.
Qatar Carbonates and Carbon Storage Research Centre
author
Qatar Carbonates and Carbon Storage Research Centre
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Imperial College London
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Imperial College London
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Imperial College London
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British Geological Survey
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